The BTW Speed Suit from Castelli is designed for maximum performance without sacrificing comfort. The suit is named after the expression 'Balls to the wall', used by 60s pilots to describe pushing their planes to the limit. Just like those pilots, this suit is meant for those days when you're going full throttle and giving the race everything you've got.This incredible suit was developed using the latest technology, including Computational Flow Dynamics (CFD) analysis, 3D test mannequins, wind tunnel testing, and real-life World Tour testing. The result is a suit that offers an impressive 3% reduction in total aero drag in the 45-65 km/h (28-40mph) range, making it ideal for the toughest and closest races.The short section of the suit is designed for improved pedal dynamics, with a form-fitting and aerodynamic design. The legs feature raw cut laser endings for added luxury. The upper part of the suit is cut with the race position in mind and includes mesh sections to improve symmetry and help manage heat and moisture.All of these features combine to make this one of the fastest speed suits ever made by Castelli. The suit weighs just 228g (M) and includes Castelli's best Progetto X² Air Seamless Seat Pad for all-day comfort during your race.Key Features:- Designed for optimal performance without sacrificing comfort- Polyester blend construction with elastine- Extensively tested to deliver the best possible aerodynamics- Built around the Progetto X² Air Seamless Seat Pad- One of Castelli's fastest models- Weight: 228g (M)